Fast and Complete Destruction of the Anti-Cancer Drug Cytarabine from Water by Electrocatalytic Oxidation Using Electro-Fenton Process

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CAMCIOĞLU Ş., ÖZYURT B., Oturan N., Trellu C., Oturan M. A.

CATALYSTS, cilt.12, sa.12, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 12 Sayı: 12
  • Basım Tarihi: 2022
  • Doi Numarası: 10.3390/catal12121598
  • Dergi Adı: CATALYSTS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, CAB Abstracts, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Directory of Open Access Journals, Civil Engineering Abstracts
  • Anahtar Kelimeler: advanced oxidation processes (AOPs), electrochemical AOPs, electro-Fenton, cytarabine, wastewater treatment, ELECTROCHEMICAL ADVANCED OXIDATION, CYTOSTATIC DRUGS, PROCESS OPTIMIZATION, CARBON FELT, DEGRADATION, REMOVAL, MINERALIZATION, KINETICS, MICROPOLLUTANTS, DECOLORIZATION
  • Ankara Üniversitesi Adresli: Evet

Özet

The fast and complete removal of the anti-cancer drug cytarabine (CYT) from water was studied, for the first time, by the electro-Fenton process using a BDD anode and carbon felt cathode. A catalytic amount (10(-4) M) of ferrous iron was initially added to the solution as catalyst and it was electrochemically regenerated in the process. Complete degradation of 0.1 mM (24.3 mg L-1) CYT was achieved quickly in 15 min at 300 mA constant current electrolysis by hydroxyl radicals ((OH)-O-?) electrocatalytically generated in the system. Almost complete mineralization (91.14% TOC removal) of the solution was obtained after 4 h of treatment. The mineralization current efficiency (MCE) and energy consumption (EC) during the mineralization process were evaluated. The absolute (second order) rate constant for the hydroxylation reaction of CYT by hydroxyl radicals was assessed by applying the competition kinetics method and found to be 5.35 x 10(9) M-1 s(-1). The formation and evolution of oxidation reaction intermediates, short-chain carboxylic acids and inorganic ions were identified by gas chromatography-mass spectrometry, high performance liquid chromatography and ion chromatography analyses, respectively. Based on the identified intermediate and end-products, a plausible mineralization pathway for the oxidation of CYT by hydroxyl radicals is proposed.